Outside dimensions are 20 7/16 W x 12 3/8 H x 16 1/8 D in inches.
Inside dimensions are 13 13/16 W x 9 13/16 H x 15 3/16 D in inches
Outside dimensions are 519 mm W x 315 mm H x 410 mm D
Inside dimensions are 351 mm W x 249 mm H x 386 mm D
This microwave is compact on the outside and roomy on the inside. It works very well.